Precision bore fused silica tubing with tapered section

Jenkins , et al. June 12, 1

Patent Grant D274257

U.S. patent number D274,257 [Application Number 06/257,180] was granted by the patent office on 1984-06-12 for precision bore fused silica tubing with tapered section. This patent grant is currently assigned to J&W Scientific, Inc.. Invention is credited to Rand G. Jenkins, Norman W. Wohlers.


United States Patent D274,257
Jenkins ,   et al. June 12, 1984

Precision bore fused silica tubing with tapered section

Claims

The ornamental design for a precision bore fused silica tubing with tapered section, as shown.
Inventors: Jenkins; Rand G. (Fair Oaks, CA), Wohlers; Norman W. (Davis, CA)
Assignee: J&W Scientific, Inc. (Rancho Cordova, CA)
Appl. No.: 06/257,180
Filed: April 24, 1981

Current U.S. Class: D24/112
Field of Search: ;210/657,660,665,667 ;D24/1.1,99,8,31,32

References Cited [Referenced By]

U.S. Patent Documents
D262573 January 1982 Wohlers
3775309 November 1973 Ito et al.
3796657 March 1974 Pretorius
4169790 October 1979 Pretorius

Other References

Fisher Scientific 1981, .COPYRGT.1980, p. 193 Chromatography Jar, Round Pyrex, Cat. No. 05-719-8A..

Primary Examiner: Ansher; Bernard
Attorney, Agent or Firm: Townsend and Townsend

Description



FIG. 1 is a front elevation of a precision bore fused silica tubing with tapered section, showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a longitudinal cross-section taken on line 4--4 of FIG. 3.

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